Loud-speaker casing



- March23 1926.

1 T. w. KIRKMAN LOUD-SPEAKER CASING vFiled Jan. 1v, 1924 @Wm-? lAljV/TOR I ATTORNEY Y hPatientedMaragl, "l

n i i' 'TiroivIAs W. ,'KIRKMAN, or NEW venian.' Y.V

Loon-SPEAKER casnvs.r

Implication' medeanuaryiv, 1924. semi No. 686,857.'

To ccillfwtom concern: Q i y, Be i knownfthat I, =lHolrtAs WV. 4Kinn- MAN, yajcitizen ofthe' United Statesfresid-A -ing at New York, -inr the, county of yNew.

New York and Y State ,of Newl York, f have invented certain new and useful Improvevmerits in Loud-Speaker..Casings, ofv Iwhich ithe.following'isf'alspecification.

vThis invention relatesto'aloud speakerk casing, `the primaryy object of vwhich is to.

constructgthesame"from parts, all of'v which have been stampedfromsheet metal. One

' v,able sealjagainst tampering'and to .so locate ,y description below taken in connection with thisseal that fit will notbe visible.- r yfOtherjobjects, features, `and advantages Awill 'more'gffully appear "from the vdetailed Y the accompanying fdrawings' lin which,

.-fFig. 1* is averticalsectionofthe device taken 1 through the -seal.

Fig. 21isgan' yenlarged view taken Aon the l y y i l preferably by afplura-lity of rivets 27,. a "suitable base 28 comprising upper and lower linee-201er@ 1..

- a Fig. v3 is Van. enlarged 'of theA lseal projecting laterallyA 'from theupper'edge of" 1 together. .withythem'old `for Y' forming the tFig. 4f'is asectional view-of the mold for theseal.-v j, i l* f- 'Referring to the-drawings in detail, the

Vreference Vnumeral 10/ designates a cup pref- V,erably ofcylindrica'lf shape provided withl a slide wall 11,'.a'botto1n12 and a'flange 13 vthe siderwall`11. VThe bottom is provided with la 1 central` screw threaded opening 14 to receive* the `postf (not shown) for supportfingonef form ofmechanism to be housed iny said casingi I The bottom-is also provided with perforations15p-and' 16 for receiving th'efbinding puostslgj'llhe side wallvj11, bottom 12 q and flange`513fiare preferably stamped p 4up from asinglesheet of material.,y y

f' The cupis provided'witha ycover-174 comprisingl the horizontalpfportions Y13y and 19,

downwardly .beyond/the flange 13 andv a @central tubular member 21`adapted to .re-

l *als eive the amplifying hornof fthe instrument.

the usual diapliragrri'221 For securing the cover '1Zto' the cup 10 I preferably employ a plurality of bolts 23 (only one being illustrated), which pass through the horizontal portion 19ofthe cover andare screw threadedto the 'flange 13 of the cup. The screwV threaded end of one (or more) of these bolts may befequipped 2O and the side wall 114of the cup-10.4 This` with a slot 24. The lower projecting endof `eachv bolt 23 is located lbetween. the skirt construction enables.y a suitable seal 25, 1

clearly illustratedin Figj, to bemolded 7 over the lowerscrew threaded endl of the bolt so as to prevent the cover 17 from being re moved or tampered with withoutk leaving 7'" evidence thereof.y The sealing material em-v ployed, preferably lead, being molded over the screw threadedl endof the bolt 23, the latter cannot be turned without removing the seal. Ifthe slot 24 is provided the seal is actually destroyed; u The seal25 is formed .by :aV mold 26fpreferably circulargin shape', v

the bottomofwhich, is-provided withsuitf able desfor stamping onthe seal'any suitable'indicia. v y 4 To the` bottom ofthe cup 10 is secured,

telescoping shell members 29 and 30, each ,of which is stamped up froma single sheet of material. The uppershell member 29;

, which is in 'thea-.form ofV aninverted cup,

preferably comprises a horizontal portion or bottom 31 resting against the bottom: 12 of the cup 1Q, ,a portion 'p32 projecting down'- wardly from the portion 31, a portion 33 eX# `tending horizontally l from the portion .32

to formaL ledgean'd second ydrojwnwardly tion=37 extending laterallyl froin-'said'-point to the flange 34 and an` upwardly projecting flange `38 telescoping within the r,flange .34.

` The shell members l29'land 30 areequipped i with central perfo-rations to receive the boss 39. ofthe cup 10 and lare also" provided with perforationsl .40 and 41 registerin re 'spectively with the'peningsl and Y tne'vllbottom 12 ofthe cup. These openings f15,'16, 40 and ilv` are adapted to receive binding posts"r4 with vv'h'ioh'v practically all speakers are equipped. y Y The part 33 of the upper shell 29v formj a ledge Vfor the base, fivhile theportion'r'f of the shell()` constitutes la restto which Vthe y 4felt vring ory rvother, :suitable pa'd1542jis attaehed, the purpose .of which will beunderstood.'VY f From the foregoing, lit Willbe seen that I have devised". a simplehousing or device for containingy the operativeY elements of a Y loud. speaker apparatus! lall of the parts of said housing, and; particularly the base thereof, being stampedy up Vfrom suitable' material. with v the resulttha-t ythe Voost of manufaeturesof :thesame is reduc/ed vto the 'portions .'31

Y' 29fand30` may be'V ,locatedl at' Vany rdistance i 'i "ifrorntlfre ledge portion 33 andv the rest portion-37 byshaping the dieslinaeoordanoe 'with the demands required in Vthis connection.. Y

I have herein` illustratedi'and deseribed what I now consider VJthe preferred form oiY my invention, but itis to be expressly understood that I do not limit myself thereto ,las many:v changes may be' made in points 'of detail-` and. other]embodimentsresorted to.

Without deviating lfroml the true: spirit" and fWhatreiaimiiS-e Y eupf-p'ortion and a .cover portiongseeured thereto, in eombin'ationvvitih a base't-here VYfor comprisingA two', Companion'- members s secured; to the j cup' and [each of; which [is fstamp'ed from a single'sheet of material,V the'. upper memberY comprising twoelevated portrons' one of WhiehL defines ledge land the upper' member.'

"member ,comprising an' eflevated" portion,-y 4a A lat'p'ortion to form Ya rest, and-'an upwardly ro eetinoannular flan e telesoo- 'inOf into c y l .22. Y

".21 l'oud -speaker easing oomprising al l@up adapted tof eontainl fso'undl .Y reproducing Ymechanism,*said ,oupj being' open-f at its top,

; Y* 5 'aV l eover secured Vto the cup A'and' losing the top vrthereof,"saldg-.ooverbeing desrgnedZfgor Vdii-eetl y oonneotion- ,l I to soundj Y, 'amplify-ing Hmeansfiand' Qa'. su "ort-forthel'rrou Yattached a p .P l

i 'to Vthe 'bottom'. t ereof,` said support v'oomprising upperV1 and lower Ashell i members interitting with Leaohi other andv e'aeh "stamped fuptrfom asinglesheetfofmaterial..'` y

i' A. loud speaker easing comprising acup-shaped part .open atit'stop' j and havi @iup ggasla't bottom,faY'cover secured to, saidshaped"fpart to close the top thereof,

.flange and The base; isl Vso constructed as f and a supportattaehed to the bottom cup'- shaped: part', said supportcoinprisingupper .i and. lower telescoping shell members eachif o'Which is stamped: up from a single sheet 4of materia-l.

upstanding* peripheral VHarige telesooping Vsnugly vWithin'theV said' peripl-ieral ,Hingeof;V l

tlie upper shellmember. e

V 5.1%; l ud speaker easing-ooinprising a A Y support for the cup seoured -to'the bottom thereof, and `co1'nprisinfn' rupper and! lower 'shell y mem?,

eu'p, a cover"securedl thereto, anda bers, eaeh of which'isstamped up'l from [a singlesheetof material,y y said upper' shell* member; beingv 1inl the'. `form of van inverted ycup and havin" ya, peripheral-ledge inter-fy mediate -oi its top and V1l`)otim1n,1 andvsaid 'g y lower shell membelbD-'g providedkwith'a' horizontal rest portionandanupstanding fiange surrounding saidrestportion and fitting snugly Within the open end of the upper shell member. 6. A support for aL `the like comprising lan uppershell member 7,

llmember eaohot which? is andl a lower sh stamped upffrom asingle piece' of'material, lthe upper member havin'gf twov elevated por(- tions one-V of'Whioh'V 'denesha ledge vandthe otherV` of which' provides ya. oupsu'pporting Vsurface and th-e loive--vshellinember being provided with an elevated portion, al `flat lportion toform arest andfan: upwardly projectingV annular i'alnge tele'seoping .into the VVupper shell member. f V In aloud' speaker easing; a Cup torind Y. of asingle sheet Vfoi material andfeomprisl- 'ing a perforatedbottom, a y'side Wall of,

"oy'liiiidrieal sha-pe, and -a fla-nge projecting!V laterally from the uppei edge of said` side Y, l'

wall, and va-"eover formedoffA a single'sheet `or .material randl- Comprising portion adapted to rest upon thef'said iiange, and@ `a' skirt*telesoopingpover vand? projecting( f downwardly from the peripheral. edgejof Asaid flange, means passing?k through *saidl flange andthe portionyofthel cover resting jthereony for securing said eover tojsaid l cup, f J

materiala'nd Comprising ajportion'adapted A to rest upon the said flange,l and a skirtno telesooping over and projecting downward-ly loud speaker cup IorV f l' Vfroment 1e"peripheraledgefiof 'said-1v flange',gf

, liieans passing''ythrough` said:r flange.L and the portion ofgtli'e` coverresting*thereon'V :for

" securing lsa'idycover tofsaidfcup, land fa seal for' said securing meansilocated'betweensaid rsliiiting andthe wall offsaifd cup.'

" ,f 9'. In aflud speaker casing andsupport,

a Vcupv stampedrfrom a single ,sheet of'mata rial and' comprising a'perforated bottom,l a `side "wall of cylindrical shape, kandY afflange," 'projectingflaterally...from the `upper edge ofsaid :side wall, a Vcover-stampedy from a V`single sheetso-f material and comprising a portion adapted to rest `upon thesaid flange, and'a skirt telescoping. over and projecting downwardly 'from the peripheral edge of] said flange, means #passingthrough saidy flange `and the portion offthefcover restingthereon for securing-said cover to said cup; Y and a'base comprising two mterfittmg kmembersV each Vstamped"upfvfrom a single sheet,

"the upper. one of which `comprises: a flat por#`r tiony of `substantially fthe Y same .diameter asfthe bottomlof said cup, a portion projecting downwardlytherefrom, a portion constitutg ing agcontinuationofandfextending later, Y allyjfromisaid" "dovinwardlyr extending pork-V tion, anda fourth portion Vformingy a cont-inuation of andiextending downwardly from' the third mentioned portionv to form al ype-` ripheral-fflangdand the lower of said interl0. Supportingfmeans'ffor'.a loud Speaker cup vor the like vcomprising: an upper, in verted, `cup-shaped base member" having ra depending peripheral flange, the bottom of said ymember forming aloud speaker cup 'n ysupporting surface, andra lower .base mem-v ber having anjup'standing peripheral flange fitting snugly "within "the lower,:l open endv ,4 'of Vthe uppefiibase member, eachf-of said'l Vr'base members bein piece yol" material. j

11. lSupporting lmeans fori-faloudspeaker Y. ve'rted cup-shaped base-member, the bottom ofsa'id memberforming aV lo'udfspeakereup-v f Y supporting` surface,"fand" ajlow'er inverted f cup-'shapedibase member having its bottom g Y forme-'d from asingle 1 engagementwith the bottom'gefffgth'e upper 6,0l 'basefmember and provided with a periph-, eral extensionfon its open endllitting Asnugly f within vthe open end of the'upper base memyber, each ofsaid base members being formed from a single piece of material.'

'12. A .device lfor supporting loud speakencup. or the like comprising upper and loiwer shell members,stelescoping Vwith eachf-other, each lof Vsaid"members being formed from a single. sheet of material, said upper shell member being` formed at itsV ,upper end with a central, cup-supporting portion and a lower, open-ended base por-Q tion fof a diameter greaterthanthatv voflits ysupporting portion, andy said vlower shell Y member lbeing*located within the lopen-ended Y portion oftheupperrmemberand havingpanz Y l v rip-standing peripheral flange fitting snuglyf v j i therein. a v y a *718.111 a device of the character described, c e

acup or similarmember. having a peripheral;-

-flange, a companion'memberhaving anjannui lar portionfresting upon said flangeiand also having'.l a skirt t'elescoping overand proj ecting downward-1y' fronr the peripheral edge Y of said flange, means kpassing' throughy said f flangeg'of the one' member and'- the annular portion of.` the'other member for securing` the Vsame to each other,"an'dpa seal! molded over the end of` 'said-'means 14.1Aflou'd speaker casing comprisinga cup-having a llange atkitsjtop, a diaphragrn',A y .l

cover, and means for securing said cupi, Y i diaphragmfand cover to eachother.compris? y `ging'screws[passing througlrthe cover, dia-y l Vvfcphragm` and flange into-'screw threaded en?v4 ygagement with said flange, and a sealmolded f.

over the projecting endof one or more of 's saidscrew's; `f V Y '15.A loud speakergoasmg, comprisin va j, Cup yhaving .a'rflange at the .top thereok a l`cove'1"'- having "a horizontal portion lin juX'tafy 'position togs'aid' flange and having an apron` kextending over and downwardly "from the periphery of said flange, adiaphragml located between saidcup and cover and engageab-le t v by said flange and saidlfh'ori.Zontalfportionffl -yofythe cover, and means VVfor securing. said c cup, cover and diaphragm comprising one or `f L more screwsl passing ydownwardly through n saidliorizontal portion of the cover, `the l Ydiaphragm andthe flange, and a seal.nioldediV yover oneorfmnre'of thelprojecting ends of l said screws Vandlocated between said apron f IntestimonyfwhereofIalfixmysigiiature. l 

